CN101690680B - Expansive orthodontic anchorage implant - Google Patents

Abstract

The invention belongs to medical equipment, and in particular relates to an expanded orthodontic anchorage implant. The outer diameter of the neck shoulder is larger than the outer diameter of the implant body. The neck shoulder is provided with a section of internal thread centered on the central axis. There is a section of inner hole at the lower end of the inner thread. The lower end of the inner hole passes through a tapered transition hole to a symmetrical gap. The upper end of the expansion body is a hexagonal structure screw cap, and the lower end of the hexagonal structure screw cap is the neck thread of the expansion body, the size of the neck thread of the expansion body matches the internal thread, and the lower end of the neck thread of the expansion body There is a section of cylinder matched with the inner hole, the lower end of the cylinder is a cone, and the cone shape is slightly smaller than the tapered transition hole described in the gap. The invention uses mechanical expansion to increase the angle of the contact surface between the end of the implant and the bone tissue, and at the same time compresses the surrounding bone tissue, greatly improving the holding force of the implant and reducing the loosening rate of the implant.

Description

An expanded orthodontic anchorage implant

technical field

The invention belongs to medical equipment, in particular to an expanded orthodontic anchorage implant.

Background technique

Orthodontic treatment is the process of applying force to the teeth or jaws and making them reach a certain position. When applying force to the teeth and jaws, the reaction force of the force must be borne by a stable device, which is the so-called "orthodontics". resistance" concept. Orthodontic anchorage implants mainly include: prosthetic implants, palatal implants, retromolar implants, micro titanium plates, micro titanium nails and many other bony anchorages. Orthodontic anchorage implants can achieve the type of tooth movement that is difficult to achieve with traditional orthodontic methods, which also affects the design and implementation of orthodontic treatment to some extent. The implant anchorage system also changes from traditional prosthetic implants to specially designed orthodontic anchorage implant systems; materials range from conventional titanium alloys to bioabsorbable materials; system designs are also increasingly miniaturized to accommodate more positions Requirements, but also reduce surgical trauma, increase patient tolerance. At present, the most common clinical application is the micro-titanium nail implant anchorage system. The micro-titanium nail implant is used as a temporary anchorage device, and its anchorage capacity comes from the initial stability of the implant, which can immediately increase the load. Miniature titanium nail implants can be easily implanted in any desired part of the jaw, with diameters ranging from 1.5mm to 3.0mm and lengths ranging from 6.0mm to 12.0mm. The design and control of orthodontic anchorage is critical to the success of orthodontic treatment. However, clinically, it is common that bone quality defects (such as osteoporosis) affect the early stability of orthodontic anchorage implants, causing implant loosening and falling off, resulting in failure of orthodontic treatment.

Contents of the invention

The purpose of the present invention is to provide an expansive orthodontic anchorage implant that has better retention performance, lower loosening and falling off rate, and can also be used as a substitute for conventional orthodontic anchorage implants after falling off.

In order to achieve the above object, the technical solution adopted by the present invention is an expanded orthodontic anchorage implant, which is characterized in that: it includes an implant and an expansion body matched with the implant, the implant is a cavity structure, and the upper end of the implant is The neck shoulder, the lower end is the implant body, the outer diameter of the neck shoulder is larger than the outer diameter of the implant body, the neck shoulder is centered on the central axis, and there is a section of internal thread, and the lower end of the internal thread has a section of inner hole, the inner hole The lower end passes through a tapered transition hole to a symmetrical gap; the upper end of the expansion body is a hexagonal structure screw cap, and the lower end of the hexagonal structure screw cap is the neck thread of the expansion body, and the size of the neck thread of the expansion body is the same as that of the expansion body. The internal thread is matched, and the lower end of the neck thread of the expansion body has a cylinder that matches the inner hole. The lower end of the cylinder is a cone, and the state of the cone is slightly smaller than the tapered transition hole described in the gap.

The outer edge of the neck shoulder is smooth.

The outer diameter of the implant body is 2.0mm, the inner diameter is 1.7mm, the length is 6.0mm, the height of the external thread is 0.15mm, the pitch of the external thread is 0.6mm, the length of the gap is 4.0mm, and the width of the gap is 0.4mm.

The neck shoulder 2 has a height of 2.0 mm, an outer diameter of 3.0 mm, an inner diameter of 0.3 mm, an internal thread height of 0.1 mm, and an internal thread pitch of 0.25 mm.

The diameter of the hexagonal screw cap is 3.0 mm, the thread height of the neck of the expansion body is 0.1 mm, and the thread pitch is 0.25 mm. The expansion core length is 8.0 mm.

The material of the implant and the expansion body matched with the implant is Ti ₆ Al ₄ V, which is easy to process and low in cost; at the same time, Ti ₆ Al ₄ V also has a certain degree of elasticity, which can meet the requirements of implant anchorage extraction .

The invention uses mechanical expansion to increase the angle of the contact surface between the end of the implant and the bone tissue, and at the same time compresses the surrounding bone tissue, greatly improving the holding force of the implant and reducing the loosening rate of the implant.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is a side view of Fig. 1;

Fig. 3 is a diagram of the use state of the present invention.

In the figure, 1. Hexagonal structure screw; 2. Neck shoulder; 3. Implant body; 4. Gap; 5. Cavity structure; 6. Neck thread of expansion body; 7. Expansion core.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings of the embodiments.

As shown in Fig. 1 and Fig. 2, including the implant and the expansion body matched with the implant, the implant is a cavity structure 5, the upper end of the implant is the neck shoulder 2, the lower end is the implant body 3, the neck shoulder The outer diameter of platform 2 is larger than the outer diameter of implant body 3. Neck shoulder 2 is provided with a section of internal thread centered on the central axis. The lower end of the internal thread has a section of inner hole. The lower end of the inner hole passes through a tapered transition hole to a symmetrical gap. 4. The upper end of the expansion body is a hexagonal structure screw cap 1, and the lower end of the hexagonal structure screw cap 1 is the neck thread 6 of the expansion body. The size of the neck thread 6 of the expansion body matches the internal thread, and the expansion There is a cylinder at the lower end of body neck thread 6 which cooperates with the inner hole. The lower end of the cylinder is a cone, and the cone shape is slightly smaller than the tapered transition hole described in gap 4. Cavities include

As shown in Figure 3, by pushing the cone at the lower end of the expansion body downward along the implant axis, when the neck thread 6 of the expansion body at the lower end of the hexagonal structure screw cap 1 engages with the internal thread of the neck shoulder 2, Rotate the hexagonal screw cap 1, the cone at the lower end of the expansion body will pass through the tapered transition hole to the symmetrical gap 4 below, and as the cone at the lower end of the expansion body continues downward, the implant body 3 will continue to expand along with the gap 4 , so as to realize the expansion of the tip of the implant body 3 and achieve a better retention effect.

During design, the outer edge of the neck shoulder 2 is smooth to reduce the damage to the gums; the implant body 3 has an outer diameter of 2.0mm, an inner diameter of 1.7mm, a length of 6.0mm, and an outer thread height of 0.15mm. The thread pitch is 0.6mm, the length of the slot 4 is 4.0mm, and the width of the slot 4 is 0.4mm; the height of the neck shoulder 2 is 2.0mm, the outer diameter is 3.0mm, the inner diameter is 0.3mm, the height of the internal thread is 0.1mm, and the internal thread The screw pitch is 0.25 mm; the hexagonal structure screw cap 1 has a diameter of 3.0 mm, the thread height of the expansion body neck thread 6 is 0.1 mm, the thread pitch is 0.25 mm, and the expansion core 7 has a length of 8.0 mm.

The implant of the present invention uses Ti ₆ Al ₄ V as a raw material, replacing the original nickel-titanium alloy. In the case of ensuring the same use effect, the difficulty of processing is reduced, thereby reducing the cost; because the orthodontic anchorage implant needs to be removed after orthodontic treatment, the expansion structure is not conducive to clinical removal of the implant, and the use of Ti ₆ Al ₄ V It has a certain shape recoverability, and it is convenient to take out the implant after the treatment. At the same time, Ti ₆ Al ₄ V has good biocompatibility and can be applied clinically; The implant protrudes outward, affecting its retention effect, and at the same time, the expansion angle of the implant can be controlled according to the depth of screwing in; the upper part of the expansion core is hexagonal in design to facilitate screwing in of auxiliary instruments.

Claims (2)

1. expansive orthodontic anchorage implant, it is characterized in that: comprise implantation body and the expander that matches with implantation body, implantation body is cavity structure (5); The implantation body upper end is neck and shoulder (2); The lower end is implantation body's body (3), and neck and shoulder (2) external diameter is greater than the external diameter of implantation body's body (3), and neck and shoulder (2) is that the center offers one section female thread with the central axis; There is one section endoporus the female thread lower end, and the endoporus lower end is through a symmetric slit (4), tapering transition hole to; Described expander upper end is hexagonal structure nut (1); Hexagonal structure nut (1) lower end is expander neck thread (6); Expander neck thread (6) size matches with described female thread; There is one section cylinder that cooperates with said endoporus expander neck thread (6) lower end, and the cylinder lower end is a cone, and cone shape is slightly less than the tapering transition hole; Described neck and shoulder (2) outward flange is slick and sly; Described implantation body body (3) external diameter is 2.0mm, and internal diameter is 1.7mm, and length is 6.0mm, and the external screw thread height is 0.15mm, and external screw thread pitch is 0.6mm, and slit (4) length is 4.0mm, and slit (4) width is 0.4mm; Described neck and shoulder (2) highly is 2.0mm, and external diameter is 3.0mm, and internal diameter is 0.3mm, and the female thread height is 0.1mm, and female thread pitch is 0.25mm; Described hexagonal structure nut (1) diameter is 3.0mm, and expander neck thread (6) thread depth is 0.1mm, and thread pitch is 0.25mm.

2. a kind of expansive orthodontic anchorage implant according to claim 1 is characterized in that: described implantation body and the expander that matches with implantation body are by Ti ₆Al ₄V processes.

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